/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraEditorSettings.h
Sets a delegate that allows external code to restrict which features can be used within the niagara editor by filtering which classes are allowed by class path.
void SetOnIsClassPathAllowed ( const [FOnIsClassPathAllowed](API\Plugins\NiagaraEditor\UNiagaraEditorSettings\FOnIsClassPathAllowed) & InOnIsClassPathAllowed )